Hi. I think i found a real "PERMANENT" solution. I had the same issue and it kept resetting my changes after each restart, thus lacking a permanent solution like most of the repliers. I am aware of both methods to disable handsfree audio as in
-disabling from sound settings
-disabling from devices and managers -> device properties -> services
Both of these methods resulted in resetting after each restart, forcing me to re-do it every time, which is a pain in the a.
However i think the solution i found is a more permanent fix. Follow these steps
1- open "Device Manager"
2- scroll down to "System Devices"
3- under that tab find your "device name" followed by "Hands-Free AG". Example "soundcore R50i Hands-Free AG"
4- right click and select "Disable". (Not uninstall or remove, because i suspect it might re-install itself after reconnecting)
5- finally doht be bothered by this ridicule anymore
I believe this is a permanent fix, at least more permanent than other methods. You will see your device + handsfree on other tabs aswell but after disabling from system devices they will not appear above in the sound tabs. For me one of my devices handsfree version disappeared from the system devices tab after i rechecked properties from devices and printers. In there they will show a problem with them (yellow triangle with ! inside) but dont be bothered by that. they will work just fine.
Sorry i cant upload a photo for some reason but i hope i explained it as best as possible and hope it solves everyones issues about this PERMANENTLY.
Finally we can rest i believe.